Controlled chest compressor
2 Assignments
0 Petitions
Accused Products
Abstract
Apparatus for repeatedly compressing the chest of a patient to stimulate blood circulation and breathing, includes an energizable actuator (16) that repeatedly presses against the patient'"'"'s chest, a torso wrap (32) that wraps to the back of the patient, and a stabilizer (130) that minimizes tilt of the actuator. The stabilizer is generally in the form of an inflatable toroid, or foam toroid, which extends substantially completely around the actuator to prevent tilting in any direction. The actuator includes a reciprocating member (14) that is not only moved down to compress the chest, but that is also pushed up to allow the chest to rise more rapidly. A pressing member (68) at the bottom of the reciprocating member, can tilt. The means for cycling includes compressed breathing gas for cyclically pushing down the reciprocating member, the actuator exhaust being delivered to the patient for breathing. Chest compression and chest recovery, respectively occupy under 30%, and over 70% of the duration of each cycle.
27 Citations
45 Claims
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33. Apparatus for applying compressions to the chest of a patient to at least stimulate blood circulation, which includes an energizable actuator that repeatedly presses down against the patient'"'"'s chest area when the patient'"'"'s chest faces upward, and a torso wrap that is coupled to said actuator and that wraps to the back of the patient, said actuator including a stationary frame, a reciprocating member, and means for cycling said reciprocating member relative to said frame to repeatedly press said reciprocating member down toward the patient'"'"'s chest during a part of each cycle, wherein:
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said reciprocating member includes a cylinder forming said stationary frame and at least two piston parts that telescope one into the other including an outer piston part that is slideable in said cylinder, and an inner piston part that is slideable in said outer piston part;
said outer piston part being slideable downward in said cylinder to a position wherein a lower end of said outer piston part lies below a lower end of said cylinder, and said inner piston part being slideable downward in said outer piston part to a position wherein a lower end of said inner piston part lies below a lower end of said outer piston part, to thereby minimize the height of the actuator;
said means for cycling said reciprocating member urging both of said piston parts downward during a part of each cycle when said reciprocating member is pressed down. - View Dependent Claims (34, 35, 36, 37)
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38. Apparatus for repeatedly pressing down against a patient'"'"'s chest when the chest faces upwardly, including a cylinder, a piston that is moveable in said cylinder, and a source of pressured gas that repeatedly applies pressured gas to said cylinder to move said piston down against the patient'"'"'s chest, wherein:
said piston includes a plurality of telescoping piston parts including a first piston part with a fitting portion that fits closely to said cylinder and is moveable downward to a lowest position wherein a lower end of said first piston part lies below said cylinder, and a second piston part with a fitting portion that fits closely to said first piston part and that is moveable downward to a position wherein a lower end of said second piston part lies below said lower end of said first piston part in said lowest position of said first piston part. - View Dependent Claims (39, 40)
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41. A method for applying pressure pulses to a patient'"'"'s chest, by repeatedly automatically energizing an actuator to apply downward forces to cyclically depress the patient'"'"'s chest and to cyclically not depress the chest to allow the chest to recover by moving up, comprising:
controlling said actuator to apply downward forces during a period that lasts between 10% and 30% of each cycle, and allowing chest recovery during at least 70% of each cycle. - View Dependent Claims (42, 43, 44, 45)
Specification